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lisa_io -- basic low-level I/O routines for Lisa

This repository is a library of several standalone assembly language software components for accessing various standard input/output devices of the Apple Lisa computer. "Standalone" means that no one component depends on any other. This design aims to make it easier for programmers to use only the components they need for their programs.

At time of writing, only some of the Lisa's standard I/O facilities, and only some ways of using those facilities, are supported by this library. More may be added as directed by need and spare time.

Documentation

Because people might choose to package individual library components into their own software projects, nearly all important documentation---including references, acknowledgements, and release history---appears within the source code files themselves.

Library components

Facility Component Notes
Keyboard and mouse lisa_console_kbmouse.x68
Text on the display lisa_console_screen.x68 Needs a font
Parallel-port hard drive lisa_profile_io.x68 Relocatable
Serial ports -- TODO
Floppy drive(s) -- TODO
Other parallel-port I/O -- TODO
AppleNet card -- TODO

Expanded notes:

  • "Needs a font": lisa_console_screen.x68 is mostly a macro library that creates display code for 8-pixel-wide fixed-width font data supplied by you. The file font_Lisa_Console.x68 contains an example of the font data the library requires, along with documentation, of course. Additionally, the program bdf_to_lisa_console_screen_x68.py can convert some fixed-width BDF font files to the necessary format.

Nobody owns lisa_io

This I/O library and any supporting programs, software libraries, and documentation distributed alongside it are released into the public domain without any warranty. See the LICENSE file for details.

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